[ 
https://issues.apache.org/jira/browse/KARAF-4317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Roland Hauser updated KARAF-4317:
---------------------------------
    Description: 
I have a cluster with 2 nodes. Both nodes have the feature listener enabled 
(org.apache.karaf.cellar.node.cfg / feature.listener = true).
On node 1, I install a custom feature repository with following command:

{{feature:repo-add  
mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features}}

On node 2, I get a NullPointerException:

{code}
2016-02-05 11:10:39,849 | ERROR | pool-50-thread-1 | RepositoryEventHandler     
      | 64 - org.apache.karaf.cellar.features - 4.0.0 | CELLAR FEATURE: failed 
to add/remove repository URL 
mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features
java.lang.NullPointerException
        at 
org.apache.karaf.cellar.features.RepositoryEventHandler.handle(RepositoryEventHandler.java:80)[64:org.apache.karaf.cellar.features:4.0.0]
        at 
org.apache.karaf.cellar.features.RepositoryEventHandler.handle(RepositoryEventHandler.java:29)[64:org.apache.karaf.cellar.features:4.0.0]
        at 
org.apache.karaf.cellar.core.event.EventDispatchTask.run(EventDispatchTask.java:57)[63:org.apache.karaf.cellar.core:4.0.0]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
Source)[:1.7.0_55]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown 
Source)[:1.7.0_55]
        at java.lang.Thread.run(Unknown Source)[:1.7.0_55]
{code}  

The same effect occurs when I use the dedicated cluster command:
{{cluster:feature-repo-add default 
mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features}}

When I disable the feature listener (org.apache.karaf.cellar.node.cfg / 
feature.listener = false), the cluster-command
{{cluster:feature-repo-add default 
mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features}}
works as exepected. The repository is then also available on node 2 and the 
feature can be installed.

If I did something wrong, it would nevertheless be helpful if an error message 
would tell what caused the problem.


  was:
I have a cluster with 2 nodes. Both nodes have the feature listener enabled 
(org.apache.karaf.cellar.node.cfg / feature.listener = true).
On node 1, I install a custom feature repository with following command:

{{feature:repo-add  
mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features}}

On node 2, I get a NullPointerException:

{code}
2016-02-05 11:10:39,849 | ERROR | pool-50-thread-1 | RepositoryEventHandler     
      | 64 - org.apache.karaf.cellar.features - 4.0.0 | CELLAR FEATURE: failed 
to add/remove repository URL 
mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features
java.lang.NullPointerException
        at 
org.apache.karaf.cellar.features.RepositoryEventHandler.handle(RepositoryEventHandler.java:80)[64:org.apache.karaf.cellar.features:4.0.0]
        at 
org.apache.karaf.cellar.features.RepositoryEventHandler.handle(RepositoryEventHandler.java:29)[64:org.apache.karaf.cellar.features:4.0.0]
        at 
org.apache.karaf.cellar.core.event.EventDispatchTask.run(EventDispatchTask.java:57)[63:org.apache.karaf.cellar.core:4.0.0]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
Source)[:1.7.0_55]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown 
Source)[:1.7.0_55]
        at java.lang.Thread.run(Unknown Source)[:1.7.0_55]
{code}  

The same effect occurs when I use the dedicated cluster command:
{{cluster:feature-repo-add default 
mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features}}

When I disable the feature listener (org.apache.karaf.cellar.node.cfg / 
feature.listener = true), the cluster-command
{{cluster:feature-repo-add default 
mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features}}
works as exepected. The repository is then also available on node 2 and the 
feature can be installed.

If I did something wrong, it would nevertheless be helpful if an error message 
would tell what caused the problem.



> NullPointerException when adding a feature repository to a cluster
> ------------------------------------------------------------------
>
>                 Key: KARAF-4317
>                 URL: https://issues.apache.org/jira/browse/KARAF-4317
>             Project: Karaf
>          Issue Type: Bug
>          Components: cellar-features
>            Reporter: Roland Hauser
>            Priority: Critical
>
> I have a cluster with 2 nodes. Both nodes have the feature listener enabled 
> (org.apache.karaf.cellar.node.cfg / feature.listener = true).
> On node 1, I install a custom feature repository with following command:
> {{feature:repo-add  
> mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features}}
> On node 2, I get a NullPointerException:
> {code}
> 2016-02-05 11:10:39,849 | ERROR | pool-50-thread-1 | RepositoryEventHandler   
>         | 64 - org.apache.karaf.cellar.features - 4.0.0 | CELLAR FEATURE: 
> failed to add/remove repository URL 
> mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features
> java.lang.NullPointerException
>       at 
> org.apache.karaf.cellar.features.RepositoryEventHandler.handle(RepositoryEventHandler.java:80)[64:org.apache.karaf.cellar.features:4.0.0]
>       at 
> org.apache.karaf.cellar.features.RepositoryEventHandler.handle(RepositoryEventHandler.java:29)[64:org.apache.karaf.cellar.features:4.0.0]
>       at 
> org.apache.karaf.cellar.core.event.EventDispatchTask.run(EventDispatchTask.java:57)[63:org.apache.karaf.cellar.core:4.0.0]
>       at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
> Source)[:1.7.0_55]
>       at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown 
> Source)[:1.7.0_55]
>       at java.lang.Thread.run(Unknown Source)[:1.7.0_55]
> {code}        
> The same effect occurs when I use the dedicated cluster command:
> {{cluster:feature-repo-add default 
> mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features}}
> When I disable the feature listener (org.apache.karaf.cellar.node.cfg / 
> feature.listener = false), the cluster-command
> {{cluster:feature-repo-add default 
> mvn:com.bechtle.terra/com.bechtle.terra.renderer.feature/LATEST/xml/features}}
> works as exepected. The repository is then also available on node 2 and the 
> feature can be installed.
> If I did something wrong, it would nevertheless be helpful if an error 
> message would tell what caused the problem.



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